In this work we use a phase-only spatial light modulator (SLM) to mimic a ring-slit aperture, containing multiple azimuthally varying phases at different radial positions. The optical Fourier transform of such an aperture is currently known and its intensity profile has been shown to rotate along its propagation axis. Here we investigate the near-field of the ring-slit aperture and show, both experimentally and theoretically, that although the near-field possesses similar attributes to its Fourier transform, its intensity profile exhibits no rotation as it propagates.
Reference:
Dudley, A and Forbes, A. 2012. From stationary annular rings to rotating Bessel beams. Journal of the Optical Society of America A, vol. 29(4), pp 567-573
Dudley, A. L., & Forbes, A. (2012). From stationary annular rings to rotating Bessel beams. http://hdl.handle.net/10204/6115
Dudley, Angela L, and A Forbes "From stationary annular rings to rotating Bessel beams." (2012) http://hdl.handle.net/10204/6115
Dudley AL, Forbes A. From stationary annular rings to rotating Bessel beams. 2012; http://hdl.handle.net/10204/6115.
Copyright: 2012 OSA. This paper was published in Journal of the Optical Society of America A and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josaa/abstract.cfm?uri=josaa-29-4-567. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
